Atul Singh
193e0d3c77
* feat: ratelimit, ghcr package and proper project refactor from askarzh * fix(bridge): validate media path * update: dependencies * fix: added LID to contact number migration
91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
package helpers
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import (
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"encoding/json"
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"fmt"
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"io"
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"log/slog"
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"net/http"
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"strings"
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"sync"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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var (
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apiKey = readApiKeyEnv()
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jwtToken string
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tokenMutex sync.Mutex
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tokenExpiresAt time.Time
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)
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func readApiKeyEnv() string {
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if v := ReadEnv("WHATSAPP_API_KEY", ""); v != "" {
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return v
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}
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if v := ReadEnv("WHATSAPP_API_SECRET", ""); v != "" {
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slog.Warn("env var is deprecated, use the new name",
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"deprecated", "WHATSAPP_API_SECRET",
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"use_instead", "WHATSAPP_API_KEY")
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return v
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}
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return ""
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}
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// GetOrRefreshJwtToken returns a valid JWT or fetches a new one
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func GetOrRefreshJwtToken() (string, error) {
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tokenMutex.Lock()
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defer tokenMutex.Unlock()
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// Reuse token if still valid
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if jwtToken != "" && time.Now().Before(tokenExpiresAt.Add(-30*time.Second)) {
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return jwtToken, nil
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}
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// Request new token
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req, err := http.NewRequest("POST", fmt.Sprintf("%s/%s", strings.TrimSuffix(apiBaseURL, "/api"), "auth/login"), nil)
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if err != nil {
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return "", err
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}
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req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", apiKey))
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client := &http.Client{Timeout: 10 * time.Second}
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resp, err := client.Do(req)
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if err != nil {
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return "", fmt.Errorf("auth request failed: %w", err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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body, _ := io.ReadAll(resp.Body)
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return "", fmt.Errorf("auth failed %d: %s", resp.StatusCode, string(body))
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}
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var data struct {
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Token string `json:"token"`
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}
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if err := json.NewDecoder(resp.Body).Decode(&data); err != nil {
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return "", fmt.Errorf("failed to decode token response: %w", err)
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}
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if data.Token == "" {
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return "", fmt.Errorf("no token returned from /auth/login")
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}
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// Parse WITHOUT verifying signature
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parsed, _, err := jwt.NewParser().ParseUnverified(data.Token, jwt.MapClaims{})
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if err == nil {
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if claims, ok := parsed.Claims.(jwt.MapClaims); ok {
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if exp, ok := claims["exp"].(float64); ok {
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tokenExpiresAt = time.Unix(int64(exp), 0)
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}
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}
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}
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jwtToken = data.Token
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slog.Info("Fetched new JWT token", "expires", tokenExpiresAt)
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return jwtToken, nil
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}
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